CTS V8-5.7L VIN P (2004)
Power Seat Motor Position Sensor: Description and Operation
POSITION SENSORS
The lumbar position sensor is a potentiometer which is attached directly to the lumbar motor. The MSM supplies a 5 volt reference voltage through the 5
volt reference circuit and ground through the low reference circuit to the lumbar position sensor. When the lumbar motor rotates, the resistance of the
potentiometer varies changing the feedback voltage of the position sensor signal circuit. This voltage varies from 0.25-4.75 volts. The MSM monitors
this voltage signal to determine the lumbar position.
When a memory set command is received, the MSM records the lumbar position by storing the feedback voltage from the position sensor. Then, when a
memory recall command is received, the MSM moves the motor until the position sensor feedback voltage equals the feedback voltage stored in
memory. The lumbar support is not involved in the easy exit function.